Teenage Sousuke Sagara is a career soldier. His past is mysterious, and it's known only that he's lived a military life since he was trained as a guerilla terrorist as a youth. Extremely logical, an experienced fighter, and quite clearly a survivor; he's the most professional even among pros. Now a member of the secret international military and information group, Mithril, Sousuke faces what might be the one situation he can't handle- japanese high school!
*and* Kaname Chidori is your average not-so-average high school girl. Her life is nearly perfect- she's smart, president of her class, and has reached an advanced stage of physical development. The only thing she's missing from her ordinary life is teenage romance. Enter a new transfer student... in addition to being a trouble-causing military freak, is he stalking Kaname? Why is he tipping over the library's bookcases, busting into the girls' locker room, and throwing grenades?? And who's that pretty girl in his shower?!?
*and* It's the year 2001. The Cold War is still ongoing, the USSR is a major and dangerous political and military force, and suddenly technology, particularly military technology, has gotten weird.
Mithril is a very secret and independent military and intelligence organization that operates internationally for the defense and promotion of peace and humanity. The halting and destruction of various 'Whispered' projects is critical for Mithril- failure could lead to a new level of violence and destruction yet unseen in history. So why are they interested in ordinary teenagers??